PHP的print函数_[PHP教程]
PHP的print函数，姑且说是函数吧啊。可以使用在PHP 4, PHP 5的环境中。
print函数的作用就是输出一个字符串。使用方法：
int print ( string arg )
print() 是一个语言结构而非函数，因此它无法被变量函数调用。 请看下面的演示：）
print("Hello World");
print "print() also works without parentheses.";
print "This spans
multiple lines. The newlines will be
output as well";
print "This spans\nmultiple lines. The newlines will be\noutput as well.";
print "escaping characters is done \"Like this\".";
// You can use variables inside of a print statement
foo = "foobar";
bar = "barbaz";
print "foo is foo"; // foo is foobar
// You can also use arrays
bar = array("value" => "foo");
print "this is {bar['value']} !"; // this is foo !
// Using single quotes will print the variable name, not the value
print 'foo is foo'; // foo is foo
// If you are not using any other characters, you can just print variables
print foo; // foobar
print <<This uses the "here document" syntax to output
multiple lines with variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon no extra whitespace!
END;
?>
注意: 由于这是一个语言结构而非函数，因此它无法被变量函数调用。
